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Thread: 2 Canon Lens

  1. #1
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    Default 2 Canon Lens

    Hi,

    I've noticed that some of the pictures that I've taken are not as sharp as those posted in the forum. Not sure if it is because my pictures are poorly taken or because the other pictures have gone thru Post-Processing like sharpenng etc....

    I posted one picture here, taken by 2 different lens. Please help me to evaluate whether the pictures are considered "Sharp", or whether it is out-of-focus.

    Both 100% Crop, EOS350D, no PP.

    LHS is Shutter 1/200sec, F/7.1
    RHS is Shutter 1/200sec, F/5.6

    Thanks for any input & advise!





  2. #2
    Member eng_keow's Avatar
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    Default Re: 2 Canon Lens

    Both of them are not sharp tho the left is a little better than the right. What lens are you using? What is the iso setting?

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    Default Re: 2 Canon Lens

    ISO100

    EF50mm F1.2L & EFS18-55mm F3.5~5.6 @ 55mm.

    I suppose at F/7.1, chances of focusing error is quite small right? Anyone have a 100% Crop of pictures by the 50mm F1.2L to show (no PP)?

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    Default Re: 2 Canon Lens

    what is the AF mode you use?
    One Shot?
    AI Focus?
    AI Servo?

    subject seems to be suffering from motion blur. i am assuming you are using One Shot AF..
    you might want to take photos of still objects to see if it is lens fault..

  5. #5

    Default Re: 2 Canon Lens

    Usually I'll focus on the eyes and while holding on to half-press, re-compose the shoot.

    Check out my photos here http://forums.clubsnap.org/showthread.php?t=289057.

  6. #6

    Default Re: 2 Canon Lens

    try setting to a faster shutter speed. and just click all the way down. should do the trick.
    if not ask her to pose for u =D

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    Default Re: 2 Canon Lens

    I tried an EF 50 F1.2L @ wide open F/1.2 the pic is still sharp.
    When I stop down to F/2.8 or smaller, ther pic is super sharp.
    Will yours is a bad copy?...

  8. #8
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    Default Re: 2 Canon Lens

    One Shot.

    motion blur @ 1/200sec..? It's quite close also.. less then 10m from the subject I guess.. After all, it's a 50mm lens.


    I tried the lens during the EOS day.. now no chance to try liao....

    Quote Originally Posted by FilterFunk View Post
    what is the AF mode you use?
    One Shot?
    AI Focus?
    AI Servo?

    subject seems to be suffering from motion blur. i am assuming you are using One Shot AF..
    you might want to take photos of still objects to see if it is lens fault..

  9. #9
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    Default Re: 2 Canon Lens

    That's what I did.. focus at the eye and then re-compose.

    Quote Originally Posted by namespace View Post
    Usually I'll focus on the eyes and while holding on to half-press, re-compose the shoot.

    Check out my photos here http://forums.clubsnap.org/showthread.php?t=289057.

  10. #10
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    Default Re: 2 Canon Lens

    Are those 100% crop also? no PP?


    Quote Originally Posted by namespace View Post
    Usually I'll focus on the eyes and while holding on to half-press, re-compose the shoot.

    Check out my photos here http://forums.clubsnap.org/showthread.php?t=289057.

  11. #11
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    Default Re: 2 Canon Lens

    hmm.. how about the one on the RHS by the kit lens? is that the best sharpness that this lens can deliver? Or can it be better?

    Quote Originally Posted by Goldenstars08 View Post
    I tried an EF 50 F1.2L @ wide open F/1.2 the pic is still sharp.
    When I stop down to F/2.8 or smaller, ther pic is super sharp.
    Will yours is a bad copy?...

  12. #12
    Member eng_keow's Avatar
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    Default Re: 2 Canon Lens

    Quote Originally Posted by Limsgp View Post
    hmm.. how about the one on the RHS by the kit lens? is that the best sharpness that this lens can deliver? Or can it be better?
    Both lenses should do better than that.

    you are right at 1/200, that should take care of motion blur. it doesn't even seem like back focusing as the back is equally blur.

    What jpeg quality did you save in L, M or S??

  13. #13

    Default Re: 2 Canon Lens

    Quote Originally Posted by Limsgp View Post
    Are those 100% crop also? no PP?
    No croping, Just resize and some Lightroom whitebalance adjustment (me shoot in RAW).

  14. #14
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    Default Re: 2 Canon Lens

    The uncropped original is attached for those interested.




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